Equinoxes
Bouvier's Law Dictionary and Concise Encyclopedia · John Bouvier; revised by Francis Rawle · 1914
Bouvier's Law Dictionary and Concise Encyclopedia
The name given to two periods of the year when the days and nights are equal; that is, when the space ol between the rising and setting of the sun is one-half of a natural day. The vernal equinox occurs about March 21, the autumnal about Septemher 23.